The simple answer is no! The fact that acrylics are water-based means that external conditions will not favour their cure systems and even when fully cured, they tend not to fair well with weather extremities such as high UV or any kind of rain, breaking down to dust. So, with this in mind and considering there's a multitude of products available specifically for external applications, we hold firm on the fact that if the joint, gap or crack is in a fully open, exposed location, then 3C Decor Caulk should NOT be used!
The percentage figure of 7.5 for 3C Decor Caulk is tried and tested for joints, gaps & cracks with moderate movement. Such as connection joints between windows or doors to walls, frames and extrusions (e.g. window ledges etc). This movement accommodates many common internal substrates in both new build and remedial works and as such, is more than enough for smaller jobs and snagging etc.
As an acrylic sealant, the material that 3C Decor Caulk is made from is known professionally as plasto-elastic which, unlike some of the cheaper end of caulks makes the product ideal for use as a filler in gaps, cracks and chips etc. on all porous surfaces such as plaster/plasterboard (painted & bare) concrete, some stone, brick and wood. Once gunned out as usual, the material spreads well with spatula or scraper type tools and forms well to shape and mould.
Being a water-based acrylic caulking sealant, 3C Decor Caulk takes most common coatings and paints with ease (when fully cured). The nature of how such a cure system works (i.e. moisture evaporation) is that it leaves a mostly dry but slightly rubbery surface, perfect for the adhesion of overpainting (or coating) with a brush, roller or other tool. Although we've never had any reports of poor adhesion or 'beading off' of paints & coatings from customers, as with all products, this claim cannot be 100% guaranteed due to many variables, thus a small test area should be done to confirm that your particular system is completely compatible.