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Here is a link to our compatibility guide where you can search by material.

HH-66 Vinyl Cement

HH-66 is specifically designed to bond PVC vinyl.  It works great for patching inflatable hulls and attaching accessories that are made of vinyl.  It is not recommended for use on EVA traction pads.

HH-66 bonds vinyl materials very well. For repairing tears, a patch will be needed.

HH-66 works very well on durable tarps made of vinyl coated fabrics.  However, HH-66 is not compatible with tarps made of polyethylene (typical “blue tarp” material) – sometimes called “poly tarps” – or with extremely thin vinyl (used for lettering or wraps).

For good-quality vinyl fabric inflatables, yes!  For most repairs, a patch will be required.

HH-66 will adhere automotive vinyl, but for large tears or cracks, it is best to use a vinyl patch to reinforce the repair.  Note:  exposure to sunlight will yellow HH-66, so excess adhesive should be removed.

Yes!  HH-66 can be used to ensure that miter joints stay closed and flush.  We have specialized instructions for this application

Polyurethane foam is the most common as a backer for vinyl, so this is the type of foam with which HH-66 Vinyl Cement is most commonly used.

As it stands, we do not currently endorse the use of HH-66 Vinyl Cement on TPU (Thermoplastic polyurethane) boats.  In fact, we don’t currently endorse the use of any of our products on TPU.

No, we do not recommend HH-66 Vinyl Cement for use with vinyl siding.

HH-66 Vinyl Cement is a superior adhesive for PVC vinyl repair – it works exceptionally well when adhering vinyl to vinyl.  On some lightweight, stretchy/conformable interior-grade vinyl materials that are fabric-backed, however, HH-66 occasionally can have a negative effect on the exterior vinyl surface.  If the bond is being made with the fabric backing and not the vinyl itself, we recommend our S-18 All-Purpose Adhesive.  S-18 has shown effectiveness on fabric-backed vinyl with less effect on the vinyl surface.

Neoprene Adhesives

Duall-88 and S-18 are suitable for bonding leather and most fabrics.  HH-66 bonds vinyl coated fabrics which are typically used in outdoor applications such as marine furniture and awnings.  Please note:  HH-66 will yellow in sunlight, so excess adhesive should be removed.

We have tested our products on fiberglass reinforced with both epoxy and polyester resin, and both HH-66 Vinyl Cement and S-18 All-Purpose Adhesive are compatible with such materials.

As the flooring of many boats is made of fiberglass, oftentimes our products are used to adhere marine carpeting to fiberglass flooring.  When working with polyester-backed carpeting (more common), we recommend S-18.  When working with vinyl-backed carpeting, we recommend HH-66.

If working with carpet tiles, we might recommend Clear-Tite Contact Cement instead, but we need to complete a bit more research.

We generally recommend one of our neoprene adhesives for EPDM (Ethylene Propylene Diene Monomer) rubber applications, yet we have found that our customers have had proven success with our Clear-Tite Contact Cement for EPDM rubber applications (roofing in particular).

We believe that Clear-Tite Contact Cement is our best product for use on EVA (Ethylene-Vinyl Acetate) foam.

We have three main neoprene adhesives:  Clear-Tite Contact Cement, Duall-88 Leather Adhesive, and S-18 All-Purpose Adhesive.  It depends on exactly what you might be attempting to bond together, but Clear-Tite works quite wel with neoprene.  S-18 and Duall-88 also are compatible with neoprene, as is our HH-66 Vinyl Cement.  We have some customers who have found success with S-18 on their neoprene wetsuits.

The two temperature ranges of interest are application temperature and service temperature.  HH-66 is best applied between 35° F and 95° F.  Once applied, HH-66 will maintain its flexibility and performance from -30° F to 150° F.

HH-66 will bond and hold underwater but should not be applied underwater.  After cleaning the area to be repaired, apply HH-66 to a patch and allow the cement to dry to a tacky condition before submerging.  Fold the patch, submerge, then carefully unfold underwater and apply while smoothing out air bubbles to ensure even contact.  HH-66 is great for repairing pool linings!

HH-66 will slightly yellow with sun exposure over time.  Excess material should be removed, and HH-66 should not be used as a seam sealing material for fabrics exposed to the sun.  Our neoprene products (Duall 88, S-18 and Clear-Tite) are stable in sunlight.

Patches will normally stay in place without pressure.  Our adhesives reach full strength in 24 hours.

HH-66 is not a gap filler.

No.  Unfortunately, HH-66 Vinyl Cement is not a sealant and is not appropriate for this application.

Please see the individual product pages for this information.

In order for our adhesives to be used in an adhesive spray gun, they need to be thinned out a bit.  As a general rule of thumb, we recommend using up to (but not more than) 20% of the appropriate thinner (HH-66 Thinner for HH-66 Vinyl Cement and RH Thinner for Clear-Tite, Duall-88, or S-18) in conjunction with the adhesive.  Not exceeding 20% of thinner will help maintain the integrity and performance of the adhesive itself.  Do make sure to mix thoroughly.  Also, make sure to use a pneumatic spray gun rather than any sort of electric spray gun.  Finally, be sure to use the sprayer in a well-ventilated area.

First, make sure the adhesive you are using is suitable for the materials being bonded.  Most adhesion failures are the result of using the incorrect adhesive for the application and materials being bonded.  If it is the correct adhesive, clean and dry the surfaces to be sure they are free of oil or contaminates.  Lightly sanding the surfaces also helps with materials that are difficult to bond.  Be sure to clean the dust from the surfaces after sanding.  Also note that HH-66 does not bond to all plastics; it should not be used with polyethylene or polypropylene.

HH-66 thickens as the solvents evaporate.  If HH-66 does become rather thick, it can be thinned with a few drops of HH-66 Thinner or acetone (acetone is the primary ingredient in some nail polish removers).  Store HH-66 in a cool, dry place, and close the lid tightly in order to prevent solvent evaporation.

Here is a link to our vinyl pool repair section which includes a how-to video.

We generally suggest 24 hours for the patch to reach full strength, but the adhesive should be mostly set after around 4 hours.

The tack can be regained by applying HH-66 Thinner to the surface.  As an alternative, applying a second coating of HH-66 will restore the tack for a brief period.

We generally recommend a chemical/solvent-resistant foam roller for use with our adhesives.  We tend to recommend the polyester short-nap type of roller, as they are inexpensive and common.

120-220 grit sandpaper has worked well for us.  The sanding does not need to be aggressive; in fact, many surfaces do not require sanding at all – just surfaces that are especially smooth.

Any alcohol is fine to use.  As a note, however, 99% isopropyl alcohol can cause issues with certain plastics, so we generally recommend using around 90% isopropyl alcohol for industrial applications.

We cannot guarantee that HH-66 Thinner will work for all previously adhered patches, but it likely could be used to “soften” the adhesive under an old patch enough to peel it away – perhaps with a moisten/scrape/repeat process.  There is a risk, however, of perhaps damaging the surface if done too aggressively.  It may be worth a try working at it slowly from the edges if there’s a little lift under the old patch, but it certainly may involve some trial and error.

If our convenient brush is used carefully, contact can be avoided.  Polyvinyl alcohol (PVA) reusable gloves are suitable for use with HH-66.

Any properly fitting respirator with cartridges designed for use with organic vapors is appropriate when working with our products.

No, all current RH Adhesives’ products are solvent-based.

Here is a link to each of our Safety Data Sheets that provide chemical composition of our products.

Yes, our products are flammable.  Use in a well-ventilated area.  Do not store next to sources of heat, spark, flame, or ignition.  Avoid prolonged breathing and concentrating of vapors.  Keep out of reach of children.

Our adhesives and thinners should be kept in the original container with the original label in a non-corrosive environment and according to all applicable laws.  Store in a cool, dry place and not next to sources of heat, spark, flame, or ignition.  Please keep out of the reach of children.

The shelf life is 18 months from the date of manufacture when stored in an unopened can.  The date of manufacture is printed on a small white sticker on the top of the can.

The can should be closed when not in use.  If a film forms on top of the can, stir thoroughly and allow the film to dissolve into the remaining cement.

If a can of our product is closed between uses, then the useful life of the adhesive should be the same as an unopened can (18 months from the date of manufacture).  If a film forms on top of the cement in the can, stir thoroughly and allow the film to dissolve into the remaining cement.

HH-66 does not freeze, but it is impacted by temperatures below freezing.  The solubility of the polymers in the solvent system is reduced at temperatures below 32° F.  This may result in a white gel appearing in the cement.  Bringing the can to room temperature and shaking it will return HH-66 to its original texture.  The performance will not be degraded.

Our cements should not settle.  If any separation does occur, however, this usually can be resolved by stirring or shaking the material.

Our products contain flammable solvents and must be disposed of properly.  Many local Department of Public Works hold periodic hazardous waste disposal days.

Call INFOTRAC for 24 Hour Emergency Response at 1-352-323-3500

  • Using an adhesive that is not compatible with the materials being bonded.
  • Not enough adhesive
  • Bonding too quickly after application of the adhesive
  • Exposure to high heat before bond has fully cured

Humidity does not affect dry time for our adhesives.

Tack Time is the period of time during which an adhesive will remain in the tacky condition after application.  The materials being bonded should be pressed together while the adhesive is still tacky.  If the adhesive dries and loses tack, another application of the adhesive will restore tack for a brief time.

Toluene is an aggressive solvent that helps to keep the solids in our cements in solution, and it also wets the surface to improve adhesion.

Solvents do not remain in the final bond.  Appropriately formulated toluene-free adhesives should perform similarly to contact cements with other solvents.

We know we encourage you to ‘Find the Right Glue,’ as glue is what most people call the sticky stuff they use when they’re trying to stick two materials together. However, a deeper dive into what’s actually a glue, an adhesive, and a cement may be considered here:

  1.  Glues are derived from natural sources.  They have been around for centuries and can be as simple as tree resin.
  2.  Adhesives are synthetic – they’re a more advanced, engineered product.  Solvent-based adhesives are mixtures of solvents and thermoplastic or slightly crosslinked polymers and are used to join the surfaces of two materials.
  3.  A cement is a homogeneous binder – a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together.  When using a solvent-based cement, the solvents evaporate leaving the two surfaces to bond at a molecular level.

In accordance with federal and state guidelines and for the safety of our consumers, suppliers, and carriers, our adhesive products are non-returnable and not refundable.  Due to the flammable nature of the solvents that constitute our adhesives, we cannot accept returns under any circumstances.

HH-66 coverage is approximately 200 square feet per gallon, as we estimate just over half an ounce per square foot of coated area.  We generally recommend both surfaces be coated, however, so one gallon will cover approximately 100 square feet of bond area, as you will need just over one ounce per square foot of bond area.

Try Our Product Quantity Calculator

If you plan on placing repeat orders or want to buy more than one case, please reach out to us directly. There are also volume discounts available on Amazon if you have a Business Account.

As soon as your order has shipped, you will receive a Shipping Confirmation email that contains tracking information.

Department of Transportation regulations prohibit air-shipping of our adhesives except in very limited quantities. Therefore, shipping times may be greater so please plan accordingly.

If possible, dab the lid area with nail polish remover, MEK, or acetone first.  Then, gently pry the can open with pliers or a silicone gripper.

Please follow the Amazon return guide, or contact your reseller.

RH Adhesives’ authorized Amazon resellers are Rigle Inc. (Business Name:  IWV USA Inc.), I’m Shopaholic (Business Name:  RuvTech Inc.), and Woof! Woof! (Business Name:  Oliver Bracken, LLC or Money or Honey, LLC).

Unfortunately, we cannot accept a return or issue a refund in this case. However, if you have a question about compatibility, please consult our compatibility chart.

Unfortunately, due to the potential hazards associated with shipping flammable liquids, we cannot support an exchange.

Yes, the performance of the adhesive should not be affected, provided that it’s still reasonably contained within the can.

Your satisfaction is important to us.  If you received a product that was significantly damaged during transit, please email us at [email protected] within 7 days of receiving the damaged product to alert us of the situation.  Please write “Replacement Request” in the subject line of the email, include photographs of the damaged product, and include your order number for our reference.

Upon receipt of your email, we will fully examine it and get back to you within a reasonable period of time via email.  If we determine that you are entitled to a replacement, we will send you a replacement item for the damaged product at no further cost to you.

Your satisfaction is important to us.  If the wrong product was delivered to you, please email us at [email protected] within 7 days of receiving the incorrect product to alert us of the situation.  Please write “Replacement Request” in the subject line of the email, include photographs of the incorrect product, and include your order number for our reference.

Upon receipt of your email, we will fully examine it and get back to you within a reasonable period of time via email.  If we determine that you are entitled to a replacement, we will send you a replacement item for the incorrect product at no further cost to you.

If you have further questions regarding your order, please contact us at [email protected] so that we can assist you.

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