Industry Focus

Adhesives Industry

Functional Fillers for Adhesives & Sealants

Overview

Adhesives and sealants are used in construction, automotive, electronics, and general industry applications. Mineral fillers play a critical functional role in these formulations — controlling rheology, reducing cost, managing shrinkage, and improving mechanical properties. Raviraj Minerals supplies calcium carbonate, talc, and dolomite engineered for adhesive and sealant applications.

Calcium Carbonate

Calcium carbonate is the primary mineral filler in most adhesive and sealant formulations. Its impact on rheology, mechanical properties, and cost efficiency makes it indispensable in construction adhesives, silicone sealants, MS polymer sealants, and polyurethane adhesives.

Raviraj Minerals supplies both uncoated and coated CaCO₃ grades for adhesives. Surface-treated grades with stearic acid or proprietary coupling agents improve compatibility with polymer binders and enhance the mechanical performance of cured adhesive joints.

Controls rheology (viscosity and thixotropy) for correct sag and flow behavior
Reduces material cost without compromising adhesive strength
Improves sealant surface appearance and paintability
Controls cure shrinkage for dimensionally stable bonded joints
Compatible with silicone, PU, MS polymer, and construction adhesive systems

Talc Powder

Talc is used in adhesive and sealant formulations as a rheological modifier and functional extender. Its plate-like morphology builds strong thixotropic behavior, preventing drip and sag in vertical-joint sealant applications. It also improves the surface quality and paintability of cured sealants.