SILAPRENE® HAPs Free Sealant DC12781

1 of 22 products in this brand
SILAPRENE® HAPs Free Sealant DC12781 is an exceptional one-part product that combines ease of application, versatility of use, high ultimate strength, permanent bonds and long service life. It is a high quality, HAPs FREE elastomeric sealant that provides superior adhesion to a variety of surfaces.

Product Type1K (1 component) Sealant, Elastomeric Sealant

Compatible Substrates & SurfacesAcrylonitrile Butadiene Styrene (ABS), Concrete, Elastomers & Rubbers, Epoxies, Fiberglass, Glass, Masonry, Metal, Phenolics, Plywood, Polyesters, Polyolefins, Polyurethane, Wood

FeaturesAcid Resistant, Chemical Resistant, Chipping Resistance, Crack Resistant, Excellent Strength, Fast Drying, Good Weather Stability, High Temperature Resistance, Peel Resistance, Primerless, Tack-free, UV Resistant, Vibration Resistance, Water Resistant

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims

Applications & Uses

Application Instructions

Preparation of substrates:

  • Surfaces to be bonded should be cleaned of all dust, oils or other contaminates. A solvent wipe is often adequate. Bonds to rigid surfaces are usually improved by a solvent wipe followed with light abrasion (180 grit), and another solvent wiping to remove abrasive residue. Dry surfaces thoroughly before applying adhesive.

Method of application:

  • HAPs free Sealant DC12781 can be applied by ordinary caulking guns or pressure pumping equipment. Pumping equipment should be of the follower-plate type and have a pump ratio of at least 40:1. Cox, Aro, Binks, DeVilbiss, Graco and Lincoln all produce suitable equipment for handling this material.
  • Silaprene HAPs free Sealant DC12781 is formulated for room temperature curing, and curing is initiated when a majority of the solvent has been evacuated from the bond line. Strength build-up is very fast in the early stages to give high holding power, with continued strength build-up over time.

Cleaner and thinner:

  • Uncured material can be cleaned up with VMP Naphtha, Heptane, and Mineral Spirits. Thinning is not recommended. If a thinner product is deemed necessary for your application, contact your Royal Adhesives & Sealants salesman.


Soluble in
Mineral spirits/Aromatic 100
Environmental Properties
ValueUnitsTest Method / Conditions
UV RatingLittle to no effect, 500hQUV - A
Slump Resistance (at RT, 30 min.)max. 0.5inch
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content55.0%
ViscosityPaste extrusion grade
Weight per Gallon7.4lb
Specific Gravity0.89
Temperature Range- 40 - 200°F

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Precautionary Data

This product is flammable. Vapors may form an explosive mixture with air. Precautions should be taken to keep product away from fire, sparks, motors and other sources of heat or flame. Turn off or deactivate any electrical equipment or sources of ignition. Adequate ventilation is required to keep vapor concentrations below the Threshold Limit Value.

  • For professional or industrial ause only
  • Customer should determine ‘fitness for use’
  • Keep away from children
  • Keep container closed when not in use
  • Store closed container under 80°F