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


HH-66 is specifically designed to bond PVC vinyl.  It works great for patching inflatable hulls and attaching accessories that are made of vinyl.

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

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

HH-66 works very well on durable tarps made of vinyl coated fabrics. However, inexpensive tarps made of polyethylene, polypropylene, or nylon (typical “blue tarp” material, or thin clear sheeting) are not compatible with our products.

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.

There are two temperature ranges of interest: application temperature and service temperature. HH-66 is best applied between 35F and 95F. Once applied, HH-66 will maintain its flexibility and performance from -20F to 150F.

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.

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

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

HH-66 is not a gap filler.

Please see the individual product pages for this information.

First, make sure the adhesive you are using is suitable for the materials being bonded. Most adhesion failures are the result off 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 hard to bond materials. Be sure to clean the dust from the surfaces after sanding. Also note: HH-66 does not bond to all plastics; it should not be used with polyethylene or polypropylene.

HH-66 thickens as solvent evaporates. Store HH-66 is a sealed container to prevent solvent evaporation. If HH-66 does thicken but is still fluid, it can be thinned with HH Thinner or acetone (Note: acetone is the primary ingredient in some nail polish removers). Do not use HH-66 if it has become very thick and barely pourable.

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

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

No, all current RH Products adhesives 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 should be kept in the original container with the original label, in a non-corrosive environment, and according to all applicable laws. Do not store 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. 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 is impacted by temperatures below freezing. The solubility of the polymers in the solvent system is reduced at temperatures below 32F. This may result in a white gel appearing in the cement. Bringing the can to room temperature and shaking will return HH-66 to its original texture. The performance will not be degraded.

Our cements should not settle but if any separation occurs 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.

  • 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.

The period of time in 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 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.

HH-66 coverage is approximately 200 square feet per gallon. We recommend both surfaces be coated, so a gallon will cover 100 square feet of bond area; for smaller projects estimate an ounce per square foot of bond area. For porous surfaces, on which we recommend two coats of product, you will need 2 ounces per square foot of bonded area.

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

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 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.

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